I get mine from Intl. Outdoor. (Sanyo) These things slide into anything that will accept a CR123. I use them in all my Quarks and other lights that AW17670 are a hair too fat for. If you don’t like stacking cells, get some of these.
It seems from Finland http://www.akkula.fi
I have ordered some 16650’s, I have no connection with the seller,
but this is the first website i have seen selling keeppowers.
Thought i would share the (hopefully) good news.
HKJ: have you confirmed your pack contains 16650’s?
Anybody ever determine if the 16650’s can be had in the HP spare 633805-001 battery packs? I located new one (4200ma) that states 6 cells in it for $24 shipped. I see they have a 5200ma? battery pack also, but it may contain 18650’s for all i know???
Keeppower is not cheaper than Intl-Outdoor, they are usually more expensive. So far there are no protected budget cells but you can get them unprotected.
How much would it be to buy the Hp pack, disassemble it, and add your own pcb’s and shrink wrap? IS has them but for $9.25 less BLF discount. Maybe they might organize a GB if prompted.